We are currently going through this with our 3 + year old son.

He is displaying some of the indicators but it's too early to hang the Autism/Aspergers label on him. Doing so will automatically set limitations in our own mind about what he is really capable of.

We've consulted an ex-pat behavioural therapist and an educational psychologist and the "Floortime" approach/technique has been recommended. You can google this and find plenty of links which describe how this works.

I agree that tackling this as early as possible in a childs development has got to be worth it.

Good luck!